Re: [ts-7000] Re: TS-7800 ADC as far as I could go...

[Jerome Leboeuf <>]

Thanks Harold,
I rode several threads giving this information and I also program successfully the ADC-24. Moreover my test programs on onboard ADC perform several sampling  (I effectively send another "start command") but all programs including the ts7800ctl.c provided by TS freeze after a few minutes. Why ?
And why cannot we get a simple library that includes the two basic functions twi_init() and twi_getData() ?



--- On Tue, 6/14/11, Harold <> wrote:

From: Harold <>
Subject: [ts-7000] Re: TS-7800 ADC as far as I could go...
To:
Date: Tuesday, June 14, 2011, 12:19 PM

 

When the command to take ADC samples is sent to the AVR, it captures 2048 samples at 2 KHz. Thus it samples for 1.024 seconds, then stops. You must then send it another start command to get another 2048 samples. I have had boards take samples for several hours in this way.

You would have to do something similar with the TS-ADC24. That is, you would tell it to start taking ADC samples, it would take 512 samples, then stop, and then you would tell it to take more samples.

--- In , Jerome Leboeuf <> wrote:
>
> Thanks Harold.
> Thus even when ADC sampling starts properly there is no way to keep it running for more than a few minutes ? (My test program seems to confirm this odd behaviour,)
> Then, the only solution is to perform analogical sampling using a TS-ADC24 ?
> Regards.
>
>
>
>
> --- On Mon, 6/13/11, Harold <> wrote:
>
> From: Harold <>
> Subject: [ts-7000] Re: TS-7800 ADC as far as I could go...
> To:
> Date: Monday, June 13, 2011, 12:39 PM
>
>
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>  
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> This has been discussed before. See the thread that starts with message #18895.
>
> http://tech.groups.yahoo.com/group/ts-7000/message/18895
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> I have used the TS-7800 ADC without any problems. As long as I do not send a TWSI command to the AVR microcontroller while it is sampling, it works fine.
>
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> --- In , "Jerome" <jeromelp@> wrote:
>
> >
>
> > Hi everybody,
>
> >
>
> > Concerning ADC sampling, it appears to me that ts7800ctl.c works quite fine though nobody has been able to convert this code to build a ADC class. At least, strangely, no other code has been published to perform ADC sampling...
>
> >
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> > Hi,
>
> >
>
> > I also failed in that attempt but cannot explain why : my ts7800ctl-V4.c version works (when it doesn't stuck at starting) but next version ts7800ctl-V5.c does not. Both versions are closed between them and also to ts7800ctl.c ;then I can't explain their respective behaviors.
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> >
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> > Moreover, when the ADC cycle fails, a cold reboot appears to be the only solution...
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> >
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> > So :
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> >
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> > 1) I'd liked to know if someone succeeded in performing ADC sampling, at least I would spend more time in this quest !
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> > 2) if you want to investigate further, email me and I'll send you my code.
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> >
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> > 3) Some information from Technologic Systems would be appreciated.
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> >
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> > Thanks
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> >
>
> > Jerome
>
> >
>

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